Issue 3515 - Replace Prefs.onLoaded event by Prefs.isLoaded promise

lib/uninstall.js

 /*
  * This file is part of Adblock Plus <https://adblockplus.org/>,
  * Copyright (C) 2006-2015 Eyeo GmbH
  *
  * Adblock Plus is free software: you can redistribute it and/or modify
  * it under the terms of the GNU General Public License version 3 as
  * published by the Free Software Foundation.
  *
  * Adblock Plus is distributed in the hope that it will be useful,
  * but WITHOUT ANY WARRANTY; without even the implied warranty of
@@ skipping 18 matching lines @@
   for (let key of keys)
     search.push(key + "=" + encodeURIComponent(info[key]));
 
   let downlCount = Prefs.notificationdata.downloadCount || 0;
   search.push("notificationDownloadCount=" + encodeURIComponent(downlCount));
 
   chrome.runtime.setUninstallURL(Utils.getDocLink("uninstalled") + "&" +
                                  search.join("&"));
 }
 
-function onPrefsLoaded()
-{
-  Prefs.onLoaded.removeListener(onPrefsLoaded);
-  setUninstallURL();
-}
-
 // The uninstall URL contains the notification download count as a parameter,
 // therefore we must wait for preferences to be loaded before generating the
 // URL and we need to re-generate it each time the notification data changes.
 if ("setUninstallURL" in chrome.runtime)
 {
-  Prefs.onLoaded.addListener(onPrefsLoaded);
+  Prefs.isLoaded.then(setUninstallURL);
   Prefs.onChanged.addListener(function(name)
   {
     if (name == "notificationdata")
       setUninstallURL();
   });
 }